crest

Medical Definition of CREST

1

: a showy tuft or process on the head of an animal and especially a bird

2

: a process or prominence on a part of an animal body: as a: the upper curve or ridge of the neck of a quadruped (as a horse); also: the mane borne on such a crest b: a ridge especially on a bone <the crest of the tibia>—see frontal crest, occipital crest